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Small green breakout board with terminal blocks and INA169 chip

Adafruit

Adafruit INA169 Analog DC Current Sensor Breakout 60V 5A

SKU CH-DMW1-G8TY8

Measures DC current up to 5 A and provides a ground-referenced analog voltage output for feedback-loop control

  • TypeSensors
  • Measures DC current up to 5A with ground-referenced analog output
  • Precision 0.1 ohm 1% sense resistor enables accurate readings
  • 2W continuous rating supports sustained high-current monitoring
  • Output scales at 1V per amp for simple microcontroller interfacing
  • Compatible with supply voltages up to 60V for versatile applications

Precision Current Monitoring

The Adafruit INA169 breakout provides a 0.1 ohm, 1% sense resistor rated for 2W continuous operation. It measures DC current draw up to 5A and produces an analog voltage output referenced to ground at 1V per Amp. This makes the board suitable for feedback-loop control in custom electronic projects.

Power Supply Compatibility

Verify that the circuit under test operates at or below 60V DC to stay within the device rating. Ensure the expected current does not exceed 5A continuous so the sense resistor remains within its 2W thermal limit. The output signal scales linearly, so confirm your ADC or controller can read the resulting voltage range.

Adjustable Sensitivity

A 10K load resistor is fitted on the board to set the default 1V per Amp scaling. Builders can cut the adjacent traces and solder a through-hole resistor to change the gain. Using 20K yields 2V per Amp while 5K yields 0.5V per Amp, allowing the output span to match different microcontroller input ranges.

Highlights

  • Measures DC current up to 5A with ground-referenced analog output
  • Precision 0.1 ohm 1% sense resistor enables accurate readings
  • 2W continuous rating supports sustained high-current monitoring
  • Output scales at 1V per amp for simple microcontroller interfacing
  • Compatible with supply voltages up to 60V for versatile applications

Specifications

TypeSensors

Questions about this item

Does the breakout include the 0.1 ohm sense resistor and terminal block, or must they be sourced separately?

The board ships with the 0.1 ohm 1% 2W sense resistor and a terminal block already fitted.

How do I decide between the default 10K load resistor and swapping to 5K or 20K?

The default 10K gives 1V per Amp; cut the traces and fit a 5K for 0.5V per Amp or a 20K for 2V per Amp to match your ADC range.

What does the 60V 5A rating mean when the sensor is installed in a circuit?

You can measure continuous DC current up to 5A on a supply rail up to 60V; the analog output scales at 1V per Amp with the stock resistor.

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